FLAME ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF COBALT IN BIOLOGICAL-MATERIALS USING A FLOW-INJECTION SYSTEM WITH ONLINE PRECONCENTRATION BY ION-PAIR ADSORPTION

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	FLAME ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF COBALT IN BIOLOGICAL-MATERIALS USING A FLOW-INJECTION SYSTEM WITH ONLINE PRECONCENTRATION BY ION-PAIR ADSORPTION
	LIU, XZ; FANG, ZL
刊名	ANALYTICA CHIMICA ACTA
	1995
卷号	316 期号:3 页码:329-335
关键词	Flow Injection Atomic Absorption Spectrometry Preconcentration Ion-pair Cobalt In Biological Samples Iron And Copper Interferences Nitroso-r Salt
ISSN号	0003-2670
英文摘要	Traces of cobalt in biological materials were determined by now-injection flame atomic absorption spectrometry. The analyte was preconcentrated and separated from the bulk of the matrix by on-line ion-pair adsorption of the cobalt-nitroso-R salt complex in the presence of tetrabutylammonium bromide as a counter-ion reagent in a flow-injection system. The ion-pair was collected on an on-line C-18 micro-column and eluted by ethanol directly into the nebulizer-burner system of an atomic absorption spectrometer. The interference from iron was masked by merging a sodium citrate solution to the sample now. An enhancement factor of 40 and a sampling frequency of 45 h(-1) were obtained for a collecting time of 60 s. The detection limit (3 sigma) in the sample digest was 3 mu g l(-1). The relative standard deviation at the 50 mu g l(-1) cobalt level was 2.4%. The analytical results obtained for standard reference biological material were in good agreement with the certified or reference values.
学科主题	Chemistry, Analytical
语种	英语
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55711]
专题	沈阳应用生态研究所_沈阳应用生态研究所
推荐引用方式 GB/T 7714	LIU, XZ,FANG, ZL. FLAME ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF COBALT IN BIOLOGICAL-MATERIALS USING A FLOW-INJECTION SYSTEM WITH ONLINE PRECONCENTRATION BY ION-PAIR ADSORPTION[J]. ANALYTICA CHIMICA ACTA,1995,316(3):329-335.
APA	LIU, XZ,&FANG, ZL.(1995).FLAME ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF COBALT IN BIOLOGICAL-MATERIALS USING A FLOW-INJECTION SYSTEM WITH ONLINE PRECONCENTRATION BY ION-PAIR ADSORPTION.ANALYTICA CHIMICA ACTA,316(3),329-335.
MLA	LIU, XZ,et al."FLAME ATOMIC-ABSORPTION SPECTROMETRIC DETERMINATION OF COBALT IN BIOLOGICAL-MATERIALS USING A FLOW-INJECTION SYSTEM WITH ONLINE PRECONCENTRATION BY ION-PAIR ADSORPTION".ANALYTICA CHIMICA ACTA 316.3(1995):329-335.